What were the #39;black codes#39;?

<div class="embed-responsive embed-responsive-16by9" style="position: relative;padding-bottom: 56.25% !important;"><iframe width="640" height="360" style="max-width: 100%;max-height: 100%; border:none;position: absolute;top: 0;left: 0;width: 100%; height: 100%;" src="https://2014tube.com/channel/TheyRewroteSlaveryAndGotAwayWithIt/videoEmbed/25465/what-were-the-amp-39-black-codes-amp-39" frameborder="0" allow="fullscreen;autoplay;camera *;microphone *;" allowfullscreen="allowfullscreen" mozallowfullscreen="mozallowfullscreen" msallowfullscreen="msallowfullscreen" oallowfullscreen="oallowfullscreen" webkitallowfullscreen="webkitallowfullscreen" scrolling="no" videoLengthInSeconds="0">iFrame is not supported!</iframe></div>
What were the #39;black codes#39;?

Embed Options
